Red mud industrial waste, byproduct of aluminum production, recycled while decomposing refrigerants

https://phys.org/news/2024-07-decomposing-refrigerants-potent-greenhouse-gas.html

"99% efficient HFC-134a refrigerant decomposition... >200K tons high alkaline red mud produced annually. containing water/ soil polluting oxides of silicon, heavy metals... heating induces iron/ aluminum interact stably decomposing refrigerants at low temperatures, minimal pollutant generation... heated inducing interactions forming tricalcium aluminate and gehlenite composite, increasing reaction surface area strengthening binding,.. also forms calcium fluoride thin film surface, protecting catalyst"

Related: Tamed molecules for more sustainable catalysts: Chemists succeed in synthesizing a spectacular gallium compound
https://phys.org/news/2024-09-molecules-sustainable-catalysts-chemists-succeed.html